Printing-machine.



PATENTED MAY 19, 1908.

S. BROWN.

PRINTING MACHINE.

APPLIGATION FILED 0OT.21. 1907.

3 SHEETS-SHEET 1.

LEM 446W No.'88'7,763 v PATENTED MAY 19, 1908.

v 8, BROWN.

PRINTING MACHINE.

APPLIOATION FILED 00T.21. 1907.

' 3 SHEETS-SHEET 2.

PATBNTED MAY 19, 1908.

S. BROWN.

PRINTING MACHINE.

APPLICATION FILED 00121. 1907,

. '3 SHEETS-SHEET 3.

' same more'particularly by means of the acum'rnn STATES PA'rENT OFFICE.

I SUMMERS BROWN, or LONDON, ENGLAND;

PRINTING-MACHINE.

No. semen.

' Specification of Letters Patent. Application filed October 21, 1907. Serial No. 398,396.

Patentedllay 19, 1908.

To all whom it may concern:

.Be it known thatfI, SUMMERS BROWN, residing at 40 Whitecross street, London, England, have invented a certain new and useful llmplrovement in Printin Machines; and I do erebg declare the folfiwing to be a full, clear, an exact description of the invention,

such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to improved ribbon feeding devices for useWith-typepartly surrounding the cylinder, drum or equivalent 0 a rotary. pnntm machine.

To enable my mvention to be better understood, I now proceed to describe the companying drawings in which on lineiAl B. Fig 1.

'ofthedru'm showing .the wedge and met od F gure 1 Isa lan. Fig.2.is a partsection Fig. 3 is a plan of art ofjinsertio'n cams; Fi 4 shows in side elevation m ans. for 'regu ating 'the position of adustable-supportcarryinBg one end of the spin e sup'port n spool. ig; 5 shows, in side eleyation the 'ction pulley 11 and proxi- 'mat'ef parts, the studs 8 and 17 being cross- "sectioned. Fig.

"same 1ste ed into stud ada ted to s11 damage. I r

is a plan showing part of ribbon-roller and the spindle carrying r rawings 1. are the side frames whicli'may hdwever vary somewhat in shape 'depfind flg upon the particular type of print machme to whic my im rovements are applied. These frames may e secured to a board- 2 or any other suitable base, as by screws 3- shown in dotted 'lines, or in any like convenient manner.

" drical surface being adapte to receive type characters 5-. A spur wheel 6 is.

4 '1s a cylinder or drum formed of wood, metal or any other material, art of the cylinprefer'ably formed in one with, or fitted to one end of the, cylinder, which is. mounted on a spindle .-7 journaled in bearings -8 formed in or secured to'the side frames. A suitably proportioned pinion f-fi engages with said wheel,- and is mounted upon as mdle 7 which passes through apap, oss

{or e uivalent form of bearing 8 and 1s fi-tte with a crank handle 9- I Biyoted in an adjustable and separate su port 8?r 1s a-spool 10 formed (at wood I one .end of which may be fashioned into a frictional pulley 1 1 and by the side of this ulley, or formed inone with it is a smal er pulley +11 the spindle 7"--- being drlven or forced through a central hole bored in the spool, and both pulleys, and

mounted in a bearing 8 adapted to slide in a slot-12'formed in the side of the and has slight freedom of movement longitudinally. Formed in onev iece with or attached to the periphery of t e drum are two mutilated cams '1 8', 1 8 which occupy a relatively definite position to each other, their ends'being tapered ofi as at -'19.

"The inner cam ..18 engages by friction at a suitable stage in therotat on of the cylinder with -'-the larger friction pulley 1 1 and causes it to unwind the printing ribbon 20 sufiiciently for taking the impression ofthe type on paper 27-; the outer cam 18 engages with the idler friction puldrives the pulley .-1'1+ operating ,s ool -10 in the reverse direction, thus win log ,back the ibbon. The effect of this is that the friction pulley 11 on spool 10-- works against the action of both came, being permitted to skid by the adjustment of the tensions rings23. An ink ribbon-20 of suitab elength is woundupon the spool 10'and' after passing over platen roller.

wound in the 'directionshown upon the sec: end s 001 10 which is mounted upon a spind e7 supported by brackets -8--' voted by screws '7- or, the like to the ame, the brackets being adjusted and supported elastically'by rods 22 pivoted to the brackets as at 22 and assing through leaf springs 23' fastene to the frame screws .7, or the like and fitted w th nuts having milled heads 24. In

9rd. 'iiithat-thesame surface of the ribbon W1 cQl ltimiously a slot 25 see also Fig.

l uid not presentcd'to the face of the.

3. is formed transversely through both the cams 18, l8"-, and a wedge -26-- ada ted to slide or be transferred from one to the other, the effect of the Wedge being to lengthen the operative'surface of contact of the particular cam in which it is inserted. for lnstance the Wedge is inserted in cam 18- which .drives the friction pulley 1 1 the effect of such insertion will be that a fresh portion of the ribbon will be advanced a certain predetermined distance each revolution, but if the wedge be withdrawn from this cam, and inserted in cam 18. the ribbon will be returned a certain predetermined distance each revolution.

The support 8" is adjustably mounted by 0 erating the milled headed nuts 8 see ig. 4. which engage with screwed pins -8 passing through a slot 12 in the bent metallic strip forming this su port and into the frame 1, the spindle 7 passing through spool 10. is pivoted in support 8 and also in the sliding bearing 8 see Fig. 5, oerated by springs -l4. The spindle -7 also carries the pulley 11-- which is forced into contact with the idler ulley 11"'-- by sprin The acfiustable support 0 crate as described is necessary to preserve t e true alinement of the spool 10 carrying ribbon 20. It is necessar that the idler pulley 11 should be ad ustably mounted on the stud 17 having slight longitudinal movement so that it niay in res onse to the action of spring 14 efl'ect t e required frictional ClIiYIHg'COIItSLCt with cam The operation of my invention is as follows: Upon rotatin the crank handle 9 in the direction 0 the arrow the ribbon 20 is unwound sufliciently to permit an im ression to be taken u )on the paper 27 fed over the platen ro er 2lwhich is forced thereby upon the ribbon overlaying the type 5- set up or mounted upon the drum 4 in any suitable manner. The

friction set up between the cam 18 and pulley -11 sullicing to rotate the spool and wind up the ribbon thereon. This continues until the cam 18 disengages itself from pullc -11 by means of the tapering ends and t 1e gap between the same, when the cam 18- engages the idler pulle -11 .on stud 17 which drives tie pulley 11 attached to the spool 10 in the reverse direction, thus Wlnding up the ribbon. The wedge 26 is shown inserted in the slot 25- thus lengthening the o erative contact surface of cam l8.- and t rereby causing the ribbon to advance by a definitc amount depending upon its width; As the operation of printing continues the length of the ribbon on spool 10*-gradually inby the spiral spring) purpose set forth.

creases over 'that upon spool 10 until such timeas the operator may determine to return it to spool 10. He then shifts the wedge 26 to slot -25- whenthe reverse action takes place and the ribbon accumulates upon spool 10.

It will be understood that the necessary friction to cause the pulleys 11, 11, and 1 1 to engage with thecams -l8-, 18'"- and effect their rotation is effected 14 the tension of whichis governed y the nuts -16- the pulley 11 on spool 10* being ept in elastic contact with ,the cams by means of the swinging bracket 8 and adjusting nuts 24- threaded upon the hinged pm 22 which passes through the leaf sprin 23 mounted u on frame -1. The rotary rinting mac ine shown in-the drawings is iagrammatically representative of its class, but in the case of rotary printing machines having a difl'erent construction of frame or detall, the spiral spring, leaf spring, slots and other cooperating parts shown will be subject to variation to meeteach particular case.

The type, which in the drawing Fig. is

shown mounted in a flexible form maybe set up in any other convenient manner the dotted type face line 28. shown in Fi .2 be ing merely intended as a guide for t ie purpose of description.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: 1. A rotary printing drum carryin type,

1 in combination with a ribbon traveing in contact therewith and frictionally operated means for causin r the travel of said ribbon forward and bae ward alternately for the 2. A rotary printing drum and its ribbon, in combination with spools on which the latter winds at its ends, mutilated cams, means for turning said cams, and arts turning with said spools and held in yielding contact with said cams, in order that the latter may cause the said ribbon to travel forward and backward substantially as set forth.

3. A rotary printing drum and its traveling'ribbon, in combination with a mutilated cam for causing a reversed motion of said ribbon, an idler pulley'in contact with said earn, a slotted part in which said idler pulley is mounted, means for turningsaid cam and a pulley carried by one of the spools and in engagement with saididler pulley substantially I as set forth.

4. A rotary printing drum and two extensible slotted cams carried thereby, in combination with a wedge adapted to be inserted in the slot of either cam for extending its contact surface, a ribbon in contact with said siesegmedrum and means for causing said ribbon to travel forward and be ckwerd, such means being actuated by said cams, and such edjusoability of the cam surfaces permitting a,

5 fresh part of the ribbon to be presented for In wiejaess Wheres? my name in. the pres Witnesses.

Witnesses U D.

315:5 WN-l 

